Median

Find the median of a stream of binary integers as fast as possible.

Input: 100 000 000 uint32 values in little-endian binary on STDIN (4 bytes each).

Output: The median value, printed as a decimal string. The median is defined as the element at index N/2 (i.e., a[50000000]) in the sorted array.

Restrictions:20s512Mb 1 Score Packages

Feel free to create an issue if you need an extra library from the standard Ubuntu repository.

Name	Version	Description
libc6-dev	2.39-0ubuntu8.7	GNU C Library: Development Libraries and Header Files Contains the symlinks, headers, and object files needed to compile and link programs which use the standard C library.
libclang-common-14-dev	1:14.0.6-19build4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-15-dev	1:15.0.7-14build3	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-16-dev	1:16.0.6-23ubuntu4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-17-dev	1:17.0.6-9ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-18-dev	1:18.1.3-1ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-19-dev	1:19.1.1-1ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-20-dev	1:20.1.2-0ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libcrypt-dev	1:4.4.36-4build1	libcrypt development files This package contains the files needed for developing applications that use libcrypt.
libgcc-10-dev	10.5.0-4ubuntu2.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-11-dev	11.5.0-1ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-12-dev	12.4.0-2ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-13-dev	13.3.0-6ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-14-dev	14.2.0-4ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libobjc-13-dev	13.3.0-6ubuntu2~24.04.1	Runtime library for GNU Objective-C applications (development files) This package contains the headers and static library files needed to build GNU ObjC applications.
libssl-dev	3.0.13-0ubuntu3.9	Secure Sockets Layer toolkit - development files This package is part of the OpenSSL project's implementation of the SSL and TLS cryptographic protocols for secure communication over the Internet. . It contains development libraries, header files, and manpages for libssl and libcrypto.
libstdc++-10-dev	10.5.0-4ubuntu2.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-11-dev	11.5.0-1ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-12-dev	12.4.0-2ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-13-dev	13.3.0-6ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-14-dev	14.2.0-4ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libtbb-dev	2021.11.0-2ubuntu2	parallelism library for C++ - development files TBB is a library that helps you leverage multi-core processor performance without having to be a threading expert. It represents a higher-level, task-based parallelism that abstracts platform details and threading mechanism for performance and scalability. . (Note: if you are a user of the i386 architecture, i.e., 32-bit Intel or compatible hardware, this package only supports Pentium4-compatible and higher processors.) . This package includes the TBB development files.

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Matt Stuchlik

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Nov 7, 2024 10:14	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
2	Nov 7, 2024 10:12	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
3	Nov 7, 2024 10:12	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
4	Nov 7, 2024 10:11	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
5	Nov 7, 2024 10:11	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
6	Nov 7, 2024 10:10	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
7	Nov 7, 2024 10:10	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
8	Nov 7, 2024 10:09	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
9	Nov 7, 2024 10:09	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
10	Nov 7, 2024 10:05	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
11	Nov 7, 2024 10:04	0	0	0	0	0	Error: Exit with code 1: Index out of bounds	stderr
12	Nov 7, 2024 10:15	80,254	688,150,683	642,082,000	16,002,000	2,297,856
13	Nov 7, 2024 10:13	80,317	685,830,612	643,611,000	14,990,000	2,396,160
14	Nov 7, 2024 10:13	80,971	693,906,613	640,968,000	22,998,000	2,285,568
15	Nov 7, 2024 10:13	82,290	699,044,559	655,787,000	18,993,000	2,457,600
16	Nov 7, 2024 10:13	82,535	704,848,055	662,789,000	13,995,000	2,437,120
17	Nov 7, 2024 10:13	82,885	703,969,810	664,664,000	14,992,000	2,269,184
18	Nov 7, 2024 10:15	83,512	714,785,995	665,803,000	18,994,000	2,367,488
19	Nov 7, 2024 10:07	84,075	717,741,903	673,427,000	15,986,000	2,523,136
20	Nov 7, 2024 10:13	84,439	719,385,880	673,417,000	18,983,000	2,510,848
21	Nov 7, 2024 10:13	84,520	720,097,303	677,063,000	16,001,000	2,351,104
22	Nov 7, 2024 10:13	85,009	725,777,063	680,073,000	17,001,000	2,400,256
23	Nov 7, 2024 10:13	86,535	740,228,897	693,596,000	15,990,000	2,314,240
24	Nov 7, 2024 10:07	87,568	745,687,307	700,059,000	18,001,000	2,502,656
25	Nov 7, 2024 10:07	88,984	754,576,233	712,676,000	16,992,000	2,445,312
26	Nov 7, 2024 10:07	89,308	760,952,005	710,348,000	21,979,000	2,404,352
27	Nov 7, 2024 10:07	91,047	776,364,430	731,593,000	14,991,000	2,285,568
28	Nov 7, 2024 10:07	91,170	785,367,603	726,603,000	20,988,000	2,465,792
29	Nov 7, 2024 10:07	92,546	788,463,263	738,878,000	19,996,000	2,437,120
30	Nov 7, 2024 10:07	92,725	786,309,635	743,360,000	16,985,000	2,367,488
31	Nov 7, 2024 10:07	93,008	788,459,550	742,674,000	19,991,000	2,514,944
32	Nov 7, 2024 10:15	95,677	809,461,756	767,563,000	16,990,000	2,433,024
33	Nov 7, 2024 10:06	103,676	875,164,622	828,168,000	21,977,000	2,449,408
34	Nov 7, 2024 10:06	107,073	908,539,427	855,997,000	21,999,000	2,285,568
35	Nov 7, 2024 10:06	107,468	912,450,277	864,251,000	16,985,000	2,400,256
36	Nov 7, 2024 10:06	111,527	938,444,319	891,534,000	22,988,000	2,314,240
37	Nov 7, 2024 10:06	111,528	940,958,784	897,538,000	16,991,000	2,506,752
38	Nov 7, 2024 10:06	114,761	964,500,032	916,067,000	24,974,000	2,265,088
39	Nov 7, 2024 10:06	115,089	971,184,098	921,735,000	21,993,000	2,281,472
40	Nov 7, 2024 10:06	118,164	1,006,472,370	937,944,000	30,998,000	2,498,560
41	Nov 7, 2024 09:57	118,732	997,829,574	945,612,000	27,988,000	2,387,968
42	Nov 7, 2024 10:06	120,471	1,013,879,025	964,870,000	22,996,000	2,469,888
43	Nov 7, 2024 09:57	129,912	1,088,137,386	1,039,294,000	25,982,000	2,478,080
44	Nov 7, 2024 09:57	135,739	1,139,951,648	1,076,093,000	36,968,000	2,322,432

Model	Intel(R) Xeon(R) CPU E3-1271 v3 @ 3.60GHz
Cores	1